| NR | do not repeat [Lat. non repetatur]; nerve root; neural retina; neutral red; noise reduction; nonreac... |
|---|---|
| RA | radioactive; ragocyte; ragweed antigen; rapidly adapting [receptors]; reactive arthritis; reciprocal... |
| RAT | repeat action tablet; rheumatoid arthritis test |
| ROAT | repeat open application test |
| SCR | Schick conversion rate; short consensus repeat; silicon-controlled rectifier; skin conductance respo... |